CVE-2018-5174

 

Published at: - 11-06-2018 11:29

Last modified: - 03-10-2022 05:45

Total changes: - 3

Description

In the Windows 10 April 2018 Update, Windows Defender SmartScreen honors the "SEE_MASK_FLAG_NO_UI" flag associated with downloaded files and will not show any UI. Files that are unknown and potentially dangerous will be allowed to run because SmartScreen will not prompt the user for a decision, and if the user is offline all files will be allowed to be opened because Windows won't prompt the user to ask what to do. Firefox incorrectly sets this flag when downloading files, leading to less secure behavior from SmartScreen. Note: this issue only affects Windows 10 users running the April 2018 update or later. It does not affect other Windows users or other operating systems. This vulnerability affects Thunderbird < 52.8, Thunderbird ESR < 52.8, Firefox < 60, and Firefox ESR < 52.8.

Common Vulnerability Scoring System (CVSS)

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

 

Verification logic

 

Reference

• https://www.mozilla.org/security/advisories/mfsa2018-13/
• https://www.mozilla.org/security/advisories/mfsa2018-12/
• https://www.mozilla.org/security/advisories/mfsa2018-11/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1447080
• 1040896-Third Party Advisory, VDB Entry
• 104136-Third Party Advisory, VDB Entry

 

Keywords

NVD

 

CVE-2018-5174

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures